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 ###Instrução: Qual foi a margem de liderança quando Schweitzer tinha 55% e Jones tinha 2%?
 ###Tabelas: CREATE TABLE tamil_nadu_government_allopathic_western_medical_colleges (tamil_nadu_government_allopathic_western_medical_colleges_id AUTO_INCREMENT PRIMARY KEY, College Name VARCHAR, Location VARCHAR, District VARCHAR, Affiliation VARCHAR, Estd VARCHAR) CREATE TABLE most_visited_tourist_attractions (most_visited_tourist_attractions_id AUTO_INCREMENT PRIMARY KEY, Rank INT, Cultural attraction VARCHAR, Type VARCHAR, Location VARCHAR, Visitors, 2007 INT) CREATE TABLE  (_id AUTO_INCREMENT PRIMARY KEY, Poll Source VARCHAR, Dates administered VARCHAR, Democrat: Brian Schweitzer VARCHAR, Republican: Roy Brown VARCHAR, Libertarian: Stan Jones VARCHAR, Lead Margin INT) CREATE TABLE all-time_liga_acb_table (all-time_liga_acb_table_id AUTO_INCREMENT PRIMARY KEY, Team VARCHAR, Season INT, Played INT, Lost INT, 1 st VARCHAR, 2 nd VARCHAR, 3 rd VARCHAR, 4 th VARCHAR, Debut VARCHAR, Since/Last App VARCHAR, Best INT) CREATE TABLE specifications_r-985_wasp_junior_sb (specifications_r-985_wasp_junior_sb_id AUTO_INCREMENT PRIMARY KEY, Engine VARCHAR, Power, continuous VARCHAR, Critical altitude This is the highest altitude at which the engine can achieve its full continuous power rating. Above this altitude, power falls off with height as with a naturally aspirated engine . See Supercharger#Altitude effects for details. VARCHAR, Power, takeoff VARCHAR, Compression ratio VARCHAR, Supercharger gear ratio VARCHAR, Octane rating VARCHAR, Dry weight VARCHAR)  
SELECT SUM Lead Margin FROM  WHERE Democrat: Brian Schweitzer = 55% AND Libertarian: Stan Jones = 2%